The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2021
Filed:
May. 06, 2019
Safran Electronics & Defense, Paris, FR;
Frédéric Bocage, Paris, FR;
Thierry Nouel De Kerangue, Paris, FR;
SAFRAN ELECTRONICS & DEFENSE, Paris, FR;
Abstract
A measurement method using an inductive proximity sensor connected to a cable, the measurement method including the following steps: applying to the cable an excitation voltage at a known reference frequency; acquiring a measurement voltage representative of the excitation current that flows in the cable and in the sensor under the effect of the excitation voltage; multiplying the measurement voltage both by a first reference signal in order to obtain a first measurement signal and also by a second reference signal in order to obtain a second measurement signal; using the first measurement signal and the second measurement signal to evaluate a measurement impedance representative of the impedance of the sensor and of the cable; using the measurement impedance to estimate the inductance of the sensor or the impedance of the sensor; and comparing the inductance of the sensor or the impedance of the sensor with a predefined detection threshold in order to obtain proximity information.